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Protists

Protists are unicellular or multicellular microorganisms. The majority of protists are responsible for many diseases in humans.

1,262 Questions

The tiny exoskeleton of a diatom is mostly composed of?

The tiny exoskeleton of a diatom is mostly composed of silica, which is a form of silicon dioxide. This silica shell gives diatoms their characteristic glass-like appearance and provides protection for the cell inside.

How do amoebas differ from sporozoan in the way they reproduce?

Amoebas reproduce asexually by binary fission, where the cell divides into two identical daughter cells. In contrast, sporozoans reproduce sexually through the formation of male and female gametes, which then fuse to form a zygote.

A member of the sporozoan group of protists is?

Plasmodium is a member of the sporozoan group of protists. It is the causative agent of malaria and has a complex life cycle involving both mosquito and human hosts.

What is the second stage of Plasmodium called?

The first stage of Plasmodium is called Sporozoite. Which lives in mosquitoes and is injected into humans.

The second stage of Plasmodium is called Merozoite.

In what ways are diatoms dinoflagellates and other plantlike protists similar to plants?

Diatoms, dinoflagellates, and other plantlike protists are similar to plants in that they photosynthesize, have chloroplasts, and are primary producers in aquatic ecosystems. They also play a crucial role in the carbon and oxygen cycles, contributing to the overall health of the environment.

How long have protists been on earth?

Protists are some of the smallest form of life. Some are so insubstantial that they do not leave a trace in the fossil record, but about fifty percent of protists species are represented as microfossils. The oldest protist microfossils indicate that they were present on earth approximately 1.5 billion years ago.

Why is it important for diatoms to live near the surface?

Diatoms rely on sunlight for photosynthesis, so living near the surface allows them to access light for energy production. Additionally, being near the surface helps diatoms to disperse their spores more effectively, promoting reproduction and species survival.

Paramecium have contractile vacuoles that pump water out their body cavities This is an example of what?

This is an example of osmoregulation, the process by which organisms control water balance and solute concentration within their cells. The contractile vacuoles in Paramecium help regulate osmotic pressure by removing excess water that enters the cell through osmosis.

Are diatoms in glass?

No, diatoms are not found in glass. Diatoms are actually microscopic algae that are encased in a cell wall made of silica. Glass, on the other hand, is produced through melting sand and other materials at high temperatures to create a transparent, solid material.

What is the process called when Amoeba reproduce?

Amoebas reproduce through a process called binary fission, where the cell divides into two daughter cells. This is a form of asexual reproduction commonly observed in single-celled organisms like amoebas.

What processes can be found in both bacteria and protists?

Both bacteria and protists share processes such as reproduction, metabolism, growth, and response to stimuli. Additionally, they both possess genetic material in the form of DNA and have cell membranes that regulate the flow of substances in and out of the cell.

Are flatworms protists?

No, planaria are a type of flatworm and are not considered a bacteria. But, planaria are good for the ecosystem- so maybe it would be like a good type of bacteria that contributes to the functioning of the human body as it the planaria would fo the Earth. You sould really look up planaria, there are pictures and more.

Why is sunlight important to plantlike protists?

Plantlike protists, which are commonly called algae, are extremely diverse. Like plants, algae are autotrophs. Most are able to use the sun's energy to make their own food.

How fast do the paramecium move?

normaly a paramecium will move in a range from 5 to 10 mph why in extreme cases like being chased by its natural preditor, the paramecium will travel about 35 mph if ever threatened.

Medical importance of protists?

Protists play a crucial role in causing diseases such as malaria, giardiasis, and toxoplasmosis. They are also used in research to understand cellular processes and develop new drugs. Additionally, some protists serve as indicators of water quality in environmental assessments.

What is the food source of paramecium?

Paramecia feed on microorganisms like bacteria, algae, and yeasts. To gather food, the Paramecium uses its cilia to sweep prey organisms, along with some water, through the oral groove, and into the mouth opening.

Why amoeba parameciun and euglena are considered eukaryotic cells?

Amoeba, Paramecium, and Euglena are considered eukaryotic cells because they have a well-defined nucleus that contains their genetic material. They also have membrane-bound organelles such as mitochondria and chloroplasts (in Euglena) that carry out specific functions within the cell. Additionally, these organisms have a complex internal structure with distinct cell organelles, which is a characteristic feature of eukaryotic cells.

How are protists different from other organisms?

Protists are a diverse group of eukaryotic organisms that do not fall into the categories of plants, animals, or fungi. They can be unicellular or multicellular, and can exhibit a wide range of structures and behaviors. Unlike plants, they do not have specialized tissues for photosynthesis, and unlike animals, they do not have complex organ systems for digestion.

What's the difference between a pennate and a centric diatom?

Pennate diatoms have elongated, bilaterally symmetrical cells with a slit-like opening, while centric diatoms are circular or oval in shape with radial symmetry. Pennate diatoms are typically found in benthic habitats, while centric diatoms are more common in planktonic environments.

What protist is common in natural streams and other bodies of water near wild animal habitats?

Giardia is a common protist found in natural streams and bodies of water near wild animal habitats. It can be spread through contaminated water sources and can cause gastrointestinal illness in humans and animals if ingested.

Fire algae are known as dinoflagellates because?

Fire algae are known as dinoflagellates because they are single-celled organisms that possess two flagella, hair-like structures used for movement. Dinoflagellates are responsible for red tide blooms, which can give the ocean a red appearance due to their rapid growth and high concentration in the water.

What do most protist heterotrophs eat?

Most protist heterotrophs feed on bacteria, algae, other protists, and organic matter in their environment. They use various mechanisms such as phagocytosis, osmotrophy, or absorption to obtain nutrients.

What ocean zone do diatoms live in?

Diatoms are primarily found in the sunlit zone of the ocean, also known as the euphotic zone. This zone receives enough sunlight for photosynthesis to occur, which is essential for diatoms as they are photosynthetic organisms. They are most abundant in surface waters where sunlight penetration is optimal.

How does the flatness of a single-celled Paramecium affect the cell's surface area-to-volume ratio?

The flatter a Paramecium cell is, the larger its surface area-to-volume ratio becomes. This allows for more efficient exchange of nutrients and waste products with its environment. A higher surface area-to-volume ratio enables the cell to more effectively support its metabolic needs.

Uses of kingdom monera?

Kingdom Monera consists of bacteria and archaea, which play important roles in various ecosystems. They are involved in nutrient cycling, such as nitrogen fixation in soil, decomposition of organic matter, and fermentation in food production. Some bacteria are also used in bioremediation to clean up pollutants, while others can be pathogenic and cause diseases in humans and other organisms.